Sökning: "Autonomic nervous system"

Visar resultat 21 - 25 av 28 uppsatser innehållade orden Autonomic nervous system.

  1. 21. Heart and ventilation rate changes during tonic immobility in Ornate Tinamou (Nothoprocta ornata) and High Andean chicken (Gallus gallus) compared to Chilean Tinamou (Nothoprocta perdicaria)

    Kandidat-uppsats, Linköpings universitet/Biologi; Linköpings universitet/Tekniska fakulteten

    Författare :Cecilia Alexis Greder; [2015]
    Nyckelord :Tonic immobility; Heart rate; Ventilation rate; Nothoprocta ornata; Nothoprocta perdicaria; Tinamou; Gallus gallus; Chicken;

    Sammanfattning : Animals can show different responses to fear for example by playing dead when there is no possibility to escape. This response is called tonic immobility (TI) and is a well-established test of fear to evaluate fearfulness. Long durations of TI are generally considered as high levels of fearfulness. LÄS MER

  3. 22. Does prenatal hypoxia lead to permanent cardiovascular change in the offspring?

    Master-uppsats, Uppsala universitet/Institutionen för farmaceutisk biovetenskap

    Författare :Elisabeth Brolin; [2015]
    Nyckelord :Developmental programming; hypoxia; dofetilide; telemetry;

    Sammanfattning : Chronic prenatal hypoxia is associated with intrauterine growth retardation and there is now some evidence that it also induces programmed hypertension in offspring. However these studies are generally confounded as hypoxia is either induced by maternal hypoxia or placental insufficiency. LÄS MER

  4. 23. Control and Development of the Autonomic Nervous System in Posthatch Broiler (Gallus gallus domesticus) and Red Junglefowl (Gallus gallus)

    Master-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi; Linköpings universitet/Tekniska fakulteten

    Författare :Åsa Näsström; [2015]
    Nyckelord :Adrenegic tone; Autonomic nervous system; Broiler; Cholinergic tone; Heart rate; Red Junglefowl RJF ;

    Sammanfattning : Heart rate is tonically regulated by the two branches of the autonomic nervous system (ANS); parasympathetic activation decreases heart rate while sympathetic activation increases it. Previous studies on the ANS in chickens have focused mainly on embryonic development, but it is largely unknown what happens in the weeks following hatching. LÄS MER

  5. 24. Application of real-time HRV biofeedback in the scenario of meditation practice : Feasibility, usability and medical fidelity

    Master-uppsats, Linnéuniversitetet/Institutionen för medieteknik (ME)

    Författare :Jan Gunzenhauser; [2015]
    Nyckelord :heart rate variability analysis; autonomic nervous system; stress quantification; meditation; real-time biofeedback; electrocardiography; Lomb method;

    Sammanfattning : Chronic stress is a prevalent and universally present hazard in modern society. It lowers the quality of life for individuals and significantly con- tributes to unsustainable health care costs. Therefore it is important to have natural and noninvasive ways of controlling stress. LÄS MER

  7. 25. Heart Rate Variability Biofeedback for Android

    Master-uppsats, KTH/Medicinsk teknik

    Författare :Andreas Berndtsson; [2013]
    Nyckelord :;

    Sammanfattning : Heart rate variability (HRV) is the variations in time between consecutive heart beats, and reflects the functioning of the autonomic nervous system. Not only is HRV a good marker for many physiological disorders, but it is well known that HRV can be altered consciously by different approaches even though it is controlled by the autonomic nervous system. LÄS MER